Stenocypris formosa
Klie: 28
Chrissia formosa ( Klie, 1938 )
Okubo: 5
Freshwater ostracods (Crustacea) from Hainan Island, southern China, with description of a new species
Ma, Shunxin
Yu, Na
Zootaxa
2020
2020-04-24
4767
2
201
243
13c3e7e6-13c1-4126-9bd1-e98be6179b71
(Klie, 1938)
Klie
1938
[151,511,945,972]
Ostracoda
Cyprididae
Chrissia
GBIF
Animalia
Podocopida
24
225
Arthropoda
species
formosa
Figures 19–20.
1938b Stenocypris formosa n. sp.— Klie: 28–30, figs. 8–11. 1974a Chrissia formosa( Klie, 1938)— Okubo: 5.
Material examined:Six females and five female valves from11DZ17, one female ( ECNU20171114/HN09) dissected; two females from WN6.
Dimensions:Female, LV, n = 2, length 1.562 –1.586mm, height 0.631 –0.635mm. FIGURE 19. Chrissia formosa( Klie, 1938a). Female. ECNU20171114/HN09. A, external view of LV; B, external view of LV. Arrow a: eggs. Scale bar: 100 μm. Description:In lateral view, carapace elongated. Greatest height posterior of mid-length. Dorsal margin arched. Ventral margin slightly concave. Calcified inner lamella anteriorly wide. Septa on margins of carapace absent ( Fig. 19A). Eggs visible through pellucid valve (arrow aon Fig. 19A). Five long natatory setae on A2 exceeding tips of terminal claws, and one short almost reaching middle of next segment ( Fig. 20A). Both tooth-bristles on third endite of Mx slightly toothed. L6 five-segmented, with two dsetae on basal segment ( Fig. 20B). UR asymmetrical. UR attachment with basal triangular reinforcement ( Fig. 20E). Seta Sashorter than 1/2 length of claw Ga, claw Gpshorter than 1/2 length of claw Ga( Fig. 20C–D). Stem of left UR smooth ( Fig. 20D), and right one with continuous line of denticles ( Fig. 20C).
Distribution:This species has been previously reported from Japan( Okubo 2004; Smith et al.2011), India( Karuthapandi et al.2014), the Philippines( Victor & Fernando 1981b), Thailand( Savatenalinton & Suttajit 2016) and Taiwanin China( Klie 1938b). During this study, this species was found in Danzhou and Waning on HainanIsland.
Remarks:The maximum height of the valve is situated at mid-length in Klie (1938b)and Victor & Fernando (1981b). Hainan specimens are more similar to specimens found in Japanby Okubo (2004)and Smith et al.(2011), with maximum height situated slightly posterior of mid-length ( Fig. 19).